The regional influence of the Arctic Oscillation and Arctic Dipole on the wintertime Arctic surface radiation budget and sea ice growth

被引：31
作者：
Hegyi, Bradley M. [1 ]
Taylor, Patrick C. [1 ]
机构：
[1] NASA, Langley Res Ctr, Climate Sci Branch, Hampton, VA 23665 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 09期
关键词：
longwave surface fluxes; Arctic sea ice; large-scale atmospheric variability; cloud radiative effect; winter; CLOUD; ATMOSPHERE; CYCLONE; IMPACT; FLUXES; MODEL; MELT; VARIABILITY; MECHANISM; LINKAGES;
D O I：
10.1002/2017GL073281
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
An analysis of 2000-2015 monthly Clouds and the Earth's Radiant Energy System-Energy Balanced and Filled (CERES-EBAF) and Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA2) data reveals statistically significant fall and wintertime relationships between Arctic surface longwave (LW) radiative flux anomalies and the Arctic Oscillation (AO) and Arctic Dipole (AD). Signifying a substantial regional imprint, a negative AD index corresponds with positive downwelling clear-sky LW flux anomalies (>10Wm(-2)) north of western Eurasia (0 degrees E-120 degrees E) and reduced sea ice growth in the Barents and Kara Seas in November-February. Conversely, a positive AO index coincides with negative clear-sky LW flux anomalies and minimal sea ice growth change in October-November across the Arctic. Increased (decreased) atmospheric temperature and water vapor coincide with the largest positive (negative) clear-sky flux anomalies. Positive surface LW cloud radiative effect anomalies also accompany the negative AD index in December-February. The results highlight a potential pathway by which Arctic atmospheric variability influences the regional surface radiation budget over areas of Arctic sea ice growth.
引用
收藏
页码：4341 / 4350
页数：10
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